Would love your opinion 💕

💕Michelle💕 • I`m a 38 yr old. My husband, 13 yr old son and I are excited to have a baby girl in July!
Hi ladies! So I wanted to know a few things. Just so you know I have a Dr. Appointment for Tuesday 6/14/16 and was going to ask her if I still had a chance of getting pregnant. I'm 37 almost 38 yrs old and my DH and I have been trying to get pregnant for 18 months now with at least one chemical. Right now I'm at CD45 and according to this app I'm at 13DPO. I was taking OPKs and charted it. It moved my O time 2 different times and my normal time frame before AF is CD38-40. 
   So now this morning I took a pregnancy test and i got a BFN. This was the 3 day I took it. It was all with FMU. My symptoms are only mild cramps and I have sticky/watery CM about med amount, and a lot of gas. 
   I would love to hear your opinions on all this. I'm am scared that I'm in early menopause. Iv been freeking out. So anything would be appreciated. Thank you ladies ❤️